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Transformer Repair & Rewinding

Maddox provides repair, rewind, and maintenance services for padmount, substation, and dry-type transformers located anywhere in North America.

Sell Your Surplus Transformers

Looking to get rid of transformers? Maddox offers nationwide pickup for surplus, scrap, or failed padmount, substation, and dry-type transformers.

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A maddox low voltage dry-type transformer

What we buy HOW IT WORKS Reviews GET STARTED

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Transformer Purchasing Specs

kVA: 5 – 15 kV

We buy used and new padmounts, substations, medium voltage dry-types, and general purpose low voltage dry-type transformers. Fill out the form below if you are unsure what type of transformer you have.

1-Phase

600 Voltage Dry-Type 10 kVA – 333 kVA

3-Phase

15 kVA – 20 MVA

Who We Buy From

5 kV or 15 kV nominal voltage rating
600A main bus ratingAmps
Fault close asymmetrical: 40 kA
Momentary switch closed asymmetrical: 25 kA
BIL: 95 kV
Space heater circuit w/ thermostat (requires 120 VAC external power source)
Provision for kirk key interlock
Mechanism & contacts: copper-silver plated
Frequency: 60 hertz
Line terminals: ANSI segment 3
Load terminals: ANSI segment 1
Enclosure: NEMA 3R, outdoor/indoor
11-gauge steel construction
ANSI 61 gray powder coating for a durable, Lasting Finish

Fast Offers

Receive the best price quickly

Dedicated Logistics

We handle transportation for you

800+ 5-Star Reviews

Over 28,000 satisfied customers

How to Sell Transformers to Maddox

Turn your old or surplus transformers into cash fast by following our simple six-step process.

Take Pictures

Take photos of the nameplate, interior cabinet, and the exterior tank.

Contact Our Purchasing Team

Once you have these photos, send them to a Maddox purchasing rep with any other relevant information.

Review Purchase Offer

After reviewing the pictures and information you send, our purchasing team will send an official purchase offer.

Load the Transformer

While Maddox covers the cost of freight, we ask you to load the truck when it arrives.

Receiving and Testing

Once your unit arrives to one of our locations, your transformer will undergo electrical and (if relevant) oil tests.

Get Paid

You’ve reached the best part of the process: getting paid for your transformer!

See How We Earned +800 Five Star Reviews

Maddox metal-enclosed switchgear provide reliable power to critical projects across the United States.

Maddox’s customer service team (Cameron) was incredibly helpful and efficient. They resolved my issue quickly and were very pleasant to work with. I would definitely recommend this company to others.

Oleg S.

Very easy company to do business with, my order showed up on time and everything was in new condition. No dents,dings etc. Thank you for a good product , working great for us.

Matt D.

I needed a transformer for an Australian piece of equipment that operates at a non-standard (in America) voltage. Maddox tech support was able to verify which transformer would work for my application. They also had the unit in stock and shipped it to me in just a few days! A great experience all around.

Dave H.

It was what our Team was looking for. We really appreciate the updates and customer service after placing the order

Rebecca K.

Easy transaction, competitive pricing. arrived on time and in excellent condition... I'm happy to do business with Maddox again.

Richard M.

Great experience from shopping to ordering, to product. Customer service answered all my questions. Highly recommended.

Petko Z.

Absolutely the best for every need that I have had. Several of my client pieces of equipment that require European voltages. Maddox has been my go to as most my daily distributor and venders don't have a clue. Plus Customer technical support is always spot on.

Paul M.

Maddox helped us find the right product and even found a rebuilt unit that met our needs and saved us $. Also, great turn around on delivery along with the communication and follow-up.

Movement S.

The manufacturer was very helpful in providing details on how to use and configure. The transformer is very versatile and can be reconfigured for different input voltages.

Niko H.

I purchased a Transformer from Maddox. They explained everything to me about what I needed. It was in stock. They arranged the shipping and was delivered to my customer right away. The service was prompt and professional.

Jay D.

Contractor installing a Maddox medium voltage dry-type transformer

Get an Offer in Minutes

Fill out the form and we will get back to you as soon as possible. Our average response time during business hours is 30 minutes.

Frequently Asked Questions

How is shipping arranged for Maddox’s metal-enclosed switches?

Maddox ships metal-enclosed switches anywhere in North America, handling all logistics at no additional charge. Request a quote here to get specific pricing and lead times.

How soon can you ship a Maddox metal-enclosed switch?

Because Maddox stocks switchgear across the United States, we have many ready-to-ship units available. If you need a custom design, request a quote to receive pricing and lead time within 30 minutes.

How soon can you ship a Maddox metal-enclosed switch?

Because Maddox stocks switchgear across the United States, we have many ready-to-ship units available. If you need a custom design, request a quote to receive pricing and lead time within 30 minutes.

Are Maddox metal-enclosed switches made in America?

Yes, Maddox stocks American-made metal-enclosed switchgear. If your project requires BABA compliance, please notify your sales rep.

Can I return or exchange a Maddox metal-enclosed switch?

Yes, Maddox metal-enclosed switches may be eligible for return or exchange within six months of shipment date. Terms and conditions apply. Learn about the Maddox return and exchange policy here.